C# ASP.NET Core Serilog add class name and method to log

Question

I recently added logging to my ASP.Net Core project. Currently the log writes to a .txt file in this format:

{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] {Message}{NewLine}{Exception}

For example:

2017-11-30 13:58:22.229 +01:00 [Information] Item created in database.

This is fine but I would like to have the name of the class that logs and the method that is being executed to this .txt file. For example when Class A writes something to the database using Method B and logs this, I would like to see something like

ClassA.MethodB: Item created in database

All the classes that log have their Logger injected into their constructors like

public class ClassA
{
    private readonly ILogger _log;

    public ClassA(ILogger<ClassA> log){
        _log = log;
    }

    public void AddItemToDb(Item item){
        //Add item
        //On success: 
        _log.LogInfo("Added item to db.");
    }
}

I'm currently using Serilog and using the following LoggerConfiguration:

var logger = new LoggerConfiguration()
    .MinimumLevel.Verbose()
    .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
    .WriteTo.RollingFile(Configuration.GetValue<string>("LogFilePath") + "-{Date}.txt", LogEventLevel.Information)
    .CreateLogger();

How can I add the class and method to my logs?

Edit

I added a custom outputTemplate to the .WriteTo.Rollingfile() method like so:

"{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] ({SourceContext}) {Message}{NewLine}{Exception}")

Which resulted in the namespace plus the class to be added in the log, only the method is missing now

Answer 1

I solved this issue by using a combination of Jordan's answer and this answer.

I changed my Loggerconfiguration by adding the logcontext through enrichment and I added the property 'method' to my outputTemplate:

var logger = new LoggerConfiguration()
    .MinimumLevel.Verbose()
    .MinimumLevel.Override("Microsoft", LogEventLevel.Warning)
    .Enrich.FromLogContext()
    .WriteTo.RollingFile(Configuration.GetValue<string>("LogFilePath") + "-{Date}.txt", LogEventLevel.Information, 
        outputTemplate: "{Timestamp:yyyy-MM-dd HH:mm:ss.fff zzz} [{Level}] ({SourceContext}.{Method}) {Message}{NewLine}{Exception}")
    .CreateLogger();

The Enrich.FromLogContext enables properties to be pushed to the outputTemplate by using the LogContext.PushProperty() method. In this case for the 'method' property (notice the {Method} in the outputTemplate).

Example for async methods:

using (LogContext.PushProperty("Method", new LogAsyncMethods().GetActualAsyncMethodName()))
{
    _log.LogInformation("Log message.");
}

Where GetActualAsyncMethodName() is written like this:

public static string GetActualAsyncMethodName([CallerMemberName]string name = null) => name;

This works fine for async methods.

Now for non-async methods this works fine:

using (LogContext.PushProperty("Method", System.Reflection.MethodBase.GetCurrentMethod().Name))
{
    _log.LogInformation("Changing of customer name succeeded");
}

Now the method name is being displayed in the logging. The SourceContext adds the namespace + the class and by adding ".{Method}" it will result in:

Namespace.ClassName.MethodName